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Green single-port PCIe x16 card with QSFP+ cage

Mellanox Technologies

Mellanox Technologies MCX415A-BCAT ConnectX-4 EN network connector PCIe 3.0 x16 40Gb/56Gb QSFP+

SKU CH-WDYX-ZET0E MPN MCX415A-BCAT

A single-port QSFP+ network adapter with PCI Express 3.0 x16 connectivity delivering 40Gb or 56Gb Ethernet over optical fibre

  • PCIe 3.0 x16 delivers high host bandwidth
  • Single 40Gb/56Gb QSFP+ port enables fast networking
  • Optical fiber support suits long-distance links
  • Plug-in card form factor fits standard servers
  • RoHS-6 certified for reduced hazardous substances

Single-port 40GbE/56GbE adapter

The Mellanox ConnectX-4 EN MCX415A-BCAT is a single-port network adapter that plugs into a PCI Express 3.0 x16 slot. It delivers 40GbE or 56GbE connectivity through one QSFP+ cage for optical fibre media. The card suits servers and workstations that need a single high-speed uplink.

Verify slot and cage compatibility

Confirm the host system has a free PCI Express 3.0 x16 slot and that the chassis can accommodate a standard-height plug-in card. The QSFP+ port accepts only compatible optical transceivers and cables rated for 40GBase-X or 56GbE operation. RoHS-6 compliance meets common environmental procurement rules.

Plug-in card with QSFP+ cage

The board uses a standard plug-in card form factor with a single QSFP+ cage facing the rear bracket. Optical transceivers insert directly into the cage without extra brackets or cables. This layout keeps the fibre path short and simplifies cable management in dense racks.

How it compares

Measured against everything we stock in Network Adapters & RJ45 Plugs, at today’s prices. Recalculated every night.

Price $415.99
Pricier than about 92% of the 1,221 comparable items (median $19.99).

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Specifications

Product
Brand nameMellanox
Size & build
Shipping weight1.36 kg
Package size221 × 170 × 56 mm

Questions about this item

Does the MCX415A-BCAT include a QSFP+ transceiver or cable, or must I buy one separately?

The adapter ships as a bare plug-in card with a QSFP+ cage. A compatible QSFP+ transceiver or direct-attach cable must be purchased separately to complete the link.

Should I choose the 40 Gb Ethernet or the 56 Gb Ethernet mode for this ConnectX-4 EN card?

The card supports both 40 Gb Ethernet and 56 Gb Ethernet signalling. Select 40 Gb Ethernet for standard 40GbE networks; choose 56 Gb Ethernet only when connecting to equipment that explicitly requires the 56 Gb InfiniBand-compatible rate.

Will a single PCI Express 3.0 x16 slot provide enough bandwidth for the 56 Gb port on this adapter?

The PCI Express 3.0 x16 host interface supplies ample throughput for the single 40 Gb or 56 Gb network port, so the slot will not limit line-rate performance.

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